// *******************************************************
// Initializes the ADC pins and their ISRs.
void heightInit(void)
{
// using code from WEEK-2_ADC, my_adc.c written by Dr. Steve Weddell
//SysCtlClockSet(SYSCTL_SYSDIV_10 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
// SYSCTL_XTAL_8MHZ);
//
// The ADC0 peripheral must be enabled for use.
SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
//
// For this example ADC0 is used with AIN0 on port B1. This
// was given by the LM3S1968 data sheet.
// Therefore, GPIO port B needs to be enabled
// so these pins can be used.
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
// Select the analog ADC function for these pins.
// The LM3S1968 data sheet was consulted to see which functions are
// allocated per pin.
GPIOPinTypeADC(GPIO_PORTB_BASE, GPIO_PIN_1);
// Enable sample sequence 3 with a processor signal trigger. Sequence 3
// will do a single sample when the processor sends a signal to start the
// conversion. Each ADC module has 4 programmable sequences, sequence 0
// to sequence 3. This example is arbitrarily using sequence 3.
ADCSequenceConfigure(ADC0_BASE, 3, ADC_TRIGGER_PROCESSOR, 0);
//
// Configure step 0 on sequence 3. Sample channel 0 (ADC_CTL_CH0) in
// single-ended mode (default) and configure the interrupt flag
// (ADC_CTL_IE) to be set when the sample is done. Tell the ADC logic
// that this is the last conversion on sequence 3 (ADC_CTL_END). Sequence
// 3 has only one programmable step. Sequence 1 and 2 have 4 steps, and
// sequence 0 has 8 programmable steps. Since we are only doing a single
// conversion using sequence 3 we will only configure step 0. For more
// information on the ADC sequences and steps, reference the datasheet.
ADCSequenceStepConfigure(ADC0_BASE, 3, 0, ADC_CTL_CH0 | ADC_CTL_IE |
ADC_CTL_END);
//
// Since sample sequence 3 is now configured, it must be enabled.
ADCSequenceEnable(ADC0_BASE, 3);
//
// Clear the interrupt status flag. This is done to make sure the
// interrupt flag is cleared before we sample.
ADCIntClear(ADC0_BASE, 3);
initCircBuf (&g_heightBuf, CIRCBUF_SIZE);
}
int main(void)
{
unsigned int i;
int sum = 0;
int current = 0;
int hgt_percent = 0;
int degrees = 0;
STATE = IDLE;
initClock();
initADC();
initYaw();
initMotorPin();
initDisplay();
intButton();
initConsole();
initPWMchan();
initCircBuf (&g_inBuffer, BUF_SIZE);
// Enable interrupts to the processor.
IntMasterEnable();
while (1)
{
//double dt = SysCtlClockGet() / SYSTICK_RATE_HZ;
degrees = yawToDeg();
// Background task: calculate the (approximate) mean of the values in the
// circular buffer and display it.
sum = 0;
for (i = 0; i < BUF_SIZE; i++) {
current = readCircBuf (&g_inBuffer);
sum = sum + current;
}
int newHght = ADC_TO_MILLIS(sum/BUF_SIZE);
if(initialRead != 0)
{
hgt_percent = calcHeight(initialRead, newHght);
}
if (STATE == FLYING || STATE == LANDING){
PIDControl(hgt_percent, SysCtlClockGet() / SYSTICK_RATE_HZ);
PWMPulseWidthSet (PWM_BASE, PWM_OUT_1, period * main_duty / 100);
PWMPulseWidthSet (PWM_BASE, PWM_OUT_4, period * tail_duty / 100);
}
displayInfo((int)initialRead, hgt_percent, degrees);
}
}
// Main function
void main(void) {
reset_peripheral(); initClock(); initTimer(); initDisplay(); initPin();
initGPIO(); initADC(); initConsole(); int i = 0;
//init_password();
send_data();
initCircBuf (&speed_buffer, BUF_SIZE); init_set_speed_data(&speed_set_data);
int screen = 0; int screen_prev = 0; float speed = 0; float buffed_speed = 0;
int fake_speed = 0; float acc = 0; float max_acc = 0; //float fuel_eco = 0;
float distance = 0;
bool fix = 0; uint8_t satillite = 0; float quality = 0; clock time;
int aim_pos = 0; unsigned long adc = 0; //int error_stepper = 0;
IntMasterEnable();
while(1){
//reading data
read_data = split_data(UART_char_data_old, read_data); // decode data
speed = read_speed(); //read data into variables
adc = run_adc()/7;
//calculations
aim_pos = speed_feedback(buffed_speed, encoder_1/40, speed_set_data.speed);
if (speed_set_data.enable == 1){
step_motor_control(encoder_1/40, aim_pos);
}
//sending fake data
fake_speed = (int)adc;//= random_at_most(100/1.852);
send_info(fake_speed);//knots
//storing data
store_speed(speed);
buffed_speed = analysis_speed();
acc = read_acceleration(buffed_speed);
max_acc = max_acc_func(acc, max_acc);
time = read_time();
satillite = read_satillite();
fix = read_fix();
quality = read_quality();
debounce_button(); // debounce buttons
screen = read_button_screen(screen, fix);
distance = read_distance();
select_read(); //need a mosfet for turning power off
// select adds a an on and off switch yo
if (screen == 1){
if(screen_prev != 1 && screen == 1){
speed_set_data.speed = buffed_speed;
}
speed_set_data.speed = set_speed(speed_set_data.speed); // set the speed to cruise at
}
if (screen == 2){ //0 to 100
acceleration_test(speed);
}
// refresh chainging
if (fix == 1 && speed_set_data.old == speed_set_data.speed && refresh_rate < 4){
UARTSend((unsigned char *)PMTK_SET_NMEA_UPDATE_5HZ, 18, 0);
refresh_rate += 1;
}
if (i >= 50){
display(screen, buffed_speed, acc, max_acc, speed_set_data.speed, satillite,
encoder_1/40, time, distance, quality, UART_char_data_old, aim_pos, adc, acc_times);
i = 0;
}
screen_prev = screen;
i++;
}
}
int main(void)
{
system_init();
clock_init();
led_init(); led_set(0x01); //show life
UART_Init(BAUD); UART_Write("\nInit"); //Show UART life
motor_init();
adc_init();
//Enable Analog pins
adc_enable(CHANNEL_SENSOR_LEFT);
adc_enable(CHANNEL_SENSOR_RIGHT);
adc_enable(CHANNEL_SENSOR_FRONT);
//Sensor value variables
uint16_t sensor_left_value = 0; uint16_t sensor_right_value = 0; uint16_t sensor_front_value = 0;
//Analog inputSignal conditioning arrays
circBuf_t left_buffer; circBuf_t right_buffer; circBuf_t front_buffer;
//Initialise sensor averaging buffers
initCircBuf(&left_buffer, ROLLING_AVERAGE_LENGTH);
initCircBuf(&right_buffer, ROLLING_AVERAGE_LENGTH);
initCircBuf(&front_buffer, ROLLING_AVERAGE_LENGTH);
//UART output buffer
char buffer[UART_BUFF_SIZE] = {0};
//=====Application specific variables===== //TODO: initialise circbuff
circBuf_t sweep_times;
initCircBuf(&sweep_times, SWEEP_TIME_MEMORY_LENGTH);
short sweep_del_t_last = 0;
short sweep_end_t_last = 0;
//time when front sensor begins to see grey.
uint32_t grey_time_start = 0;
bool sweep_ended = FALSE;
//set high if the front sensor crosses the line
bool front_crossed_black = FALSE;
//set high if front finds finish line
bool front_crossed_grey = FALSE;
bool sensor_update_serviced = TRUE;
action current_action = IDLE;
int16_t forward_speed = DEFAULT_FORWARD_SPEED;
int16_t turn_speed = DEFAULT_SPEED;
//Scheduler variables
uint32_t t = 0;
//Loop control time variables
uint32_t maze_logic_t_last = 0;
uint32_t sample_t_last = 0;
uint32_t UART_t_last = 0;
clock_set_ms(0);
sei(); // Enable all interrupts
UART_Write("ialized\n");
//wait for start command
DDRD &= ~BIT(7);
PORTD |= BIT(7);
//motor_set(128, 128);
while((PIND & BIT(7)))
{
continue;
}
while(1)
{
t = clock_get_ms();
//check if a sensor update has occured
if ((sensor_update_serviced == FALSE) &&
(t%MAZE_LOGIC_PERIOD == 0) && (t != maze_logic_t_last))
{
sensor_update_serviced = TRUE;
// finishing condition is a grey read for a set period
if(is_grey(sensor_front_value) && front_crossed_grey == FALSE)
{
front_crossed_grey = TRUE;
grey_time_start = t; //TODO: adjust so that finishing condition is a 1/2 whole sweeps on grey line
}
else if (is_grey(sensor_front_value) && front_crossed_grey == TRUE)
{
//
if ((grey_time_start + GREY_TIME) <= t )
{
// Finish line found. Stop robot.
maze_completed(); // wait for button push
front_crossed_grey = FALSE;
}
}
else
{
front_crossed_grey = FALSE;
}
//see if the front sensor crosses the line in case we run into a gap
if(is_black(sensor_front_value)&&front_crossed_black == FALSE)
{
front_crossed_black = TRUE;
//check for false finish line
if(front_crossed_grey)
front_crossed_grey = FALSE; //false alarm
}
// when both rear sensors go black, this indicates an intersection (turns included).
// try turning left
if(is_black(sensor_left_value) && is_black(sensor_right_value))
{
sweep_ended = TRUE;
motor_set(0, 255);
PORTB |= BIT(3);
PORTB |= BIT(4);
}
//when both sensors are completely white this indicates a dead end or a tape-gap
else if (is_white(sensor_left_value) && is_white(sensor_right_value))
{
sweep_ended = TRUE;
PORTB &= ~BIT(3);
PORTB &= ~BIT(4);
//current_action = ON_WHITE;
//Check if the front sensor is on black, or has been during the last sweep.
if(is_black(sensor_front_value) | front_crossed_black)
motor_set(255, 255);
else if (is_white(sensor_front_value))
motor_set(-255, 255);
}
//sweep to the side that reads the darkest value
else if (sensor_left_value + SENSOR_TOLLERANCE < sensor_right_value)
{
PORTB &= ~BIT(3);
PORTB |= BIT(4);
if (current_action == SWEEP_LEFT)
sweep_ended = TRUE;
current_action = SWEEP_RIGHT;
motor_set(forward_speed + turn_speed, forward_speed);
}
else if(sensor_right_value + SENSOR_TOLLERANCE< sensor_left_value)
{
PORTB |= BIT(3);
PORTB &= ~BIT(4);
if (current_action == SWEEP_RIGHT)
sweep_ended = TRUE;
current_action = SWEEP_LEFT;
motor_set(forward_speed, forward_speed+ turn_speed);
}
//If a new sweep started this cycle, find how long it took
if (sweep_ended)
{
//reset front black crossing detection variable
sweep_ended = FALSE;
if (front_crossed_black)
front_crossed_black = FALSE;
//Calculate sweep time
sweep_del_t_last = t - sweep_end_t_last;
sweep_end_t_last = t;
writeCircBuf(&sweep_times, sweep_del_t_last);
//adjust turn_speed for battery level.
if (sweep_del_t_last > IDEAL_SWEEP_TIME)
{
turn_speed += 5;
}
if (sweep_del_t_last < IDEAL_SWEEP_TIME)
{
turn_speed -= 5;
}
turn_speed = regulate_within(turn_speed, MIN_TURN_SPEED, MAX_TURN_SPEED);
}
}
//Sensor value update
if((t%SAMPLE_PERIOD == 0) & (t!=sample_t_last))
{
sample_t_last = t;
//read in analog values
sensor_update(CHANNEL_SENSOR_LEFT, &left_buffer, &sensor_left_value );
sensor_update(CHANNEL_SENSOR_RIGHT, &right_buffer, &sensor_right_value );
sensor_update(CHANNEL_SENSOR_FRONT, &front_buffer, &sensor_front_value );
sensor_update_serviced = FALSE;
}
//display debug information
if((t%UART_PERIOD == 0) & (t != UART_t_last) & UART_ENABLED)
{
UART_t_last = t;
sprintf(buffer, "sweep_time: %u \n", sweep_del_t_last);
UART_Write(buffer);
sprintf(buffer, "L: %u F: %u R: %u", sensor_left_value, sensor_front_value, sensor_right_value);
UART_Write(buffer);
UART_Write("\n");
}
}
}
